68HC11 Microcontroller Circuits
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The MiniBoard, a Motorola 68HC11 Robot Controller board designed by Fred G. Martin, also uses this driver. The day after, I then decided to prepare the page describing how to use C-52 EVB as a robot controller board. I asked my student for competition, build.... -
The cross compiler works on any host supported by GNU tools (Solaris, GNU/Linux, FreeBSD, HP/UX, MacOS X, Windows,...)... -
CallID Unit based on Motorola MC68HC11A1P & MC145447P chips compatible with the standard protocols. if you got a multimeter and a phone you can start testing. Check the voltage across the pair, should be 48VDC in US, 60VDC in Europe. Place a 600 ohm....
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This is a simple display controller. It can be controlled with a small microcontroller, such as MCS51, 68HC11, Z80, AVR and others. Several years ago, I found an article that controlling a TV with only a PIC micorcontroller, and I surprised to it. It is.... -
This article explains how to design a stepper motor system using an 8-bit Freescale microcontroller - MC68HC11E9.. -
The following are detailed schematics for the QScreen Controller. The QScreen Controller combines an embedded computer based on the 68HC11 microcontroller with a touch panel and LCD (liquid crystal display) graphic user interface ( GUI ) that is ideal for.... -
The QCard Controller Single Board Computer ( SBC ) contains the Freescale 68HC11 microcontroller, RAM and Flash memory, digital input-output ( I/O ), and A/D. For more complete information about the QCard headers listed on this page, please see Getting to....
New Circuits
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This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of.... -
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is.... -
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to.... -
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This.... -
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the.... -
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,.... -
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the.... -
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power.... -
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
In order to simplify the transmitter design, we've used the new pll circuit from Motorola :the...
In general, the transceiver switches the 4-element 1500 ohm xtal BPF ends between the inputs and...
This circuit provides a cheap alternative to the LM3915 series LED displays. The meter relies on...
This battery-powered metal detector uses four exclusive-OR gates contained in the 4030 CMOS...
National Semiconductor's DP8464B is primarily intended for use in disk systems as a pulse...
Can be directly connected to CD players, tuners and tape recorders. Simply add a 10K Log...
Which switch mode power supply (SMPS) topology should one start with IMHO although the schematic...
The common characteristic of all of the previous low power FM transmitters I`ve built over the...
Voltage variations and power cuts adversely affect various equip- ment such as TVs, VCRs, music...
This can be a thin strand of wire, like one of the copper "hairs" from a section of lamp cord,...
The compact, low-cost condenser mic audio amplifier described here provides good-quality audio of...
The system uses optical fingerprint sensor with ARM Cortex M3 core STMicroelectronics 32-bit...
NS LM4766 US company launched a two-channel power amplifier integrated circuits, each channel on...
LM2002 / 2002A is an audio power amplifier integrated circuits, LM2002A high pressure protection,...